Barnes & Noble introduced its electronic book reader, the Nook, in mid-October 2009. Within days it became Barnes & Noble’s fastest selling product. In fact, sales were so good that Barnes & Noble announced in mid-November that customers ordering the Nook would not receive it until the first week of January at the earliest. So, a huge number of customers looking forward to receiving or giving the Nook for Christmas would be disappointed. Barnes & Noble’s explanation for the shortfall was that it had underestimated demand and could not ramp up production in time to meet holiday demand. Is Barnes & Noble’s failure to have a sufficient inventory of Nooks to meet demand a supply chain problem? Why or why not? Discuss.